Photographic-printing machine.



F. W. BARNES.

PHOTOGRAPHIC PRINTING MACHINE. APPLICATION FILED OCT. 21. 1915.

1 ,266,385.' Patented May 14, 1918.

2 SHEETSSHEET I.

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F. W. BARNES.

PHOTOGRAPHIC PRINTING MACHINE.

APPLICATION FILED OCT. 27. I915.

Patented May 14, 1918.

2 SHEETS-SHEET 2 WITNESSES :V

taking into notches 23 in the rods. The portion 24 of the cover frame 2 is suitably cut away to permit both plates to pass partially beneath it.- It will thus be seen that the actual opening through which the light passes may be restricted or enlarged and as its rectangular area is changed, the posltion of the center of its field changes also.

In order to permit the printing lamp 5 to be positioned directly beneath a negatlve or printing area of any size or beneath any particular part of the negative so that its actlon will be intensified at that point, I mount both lamps but especially the lamp 5 upon a movable support so that it may travel back and forth in all directions on the bottom or floor of the box 1 transversely of the printing aperture 3. For this purpose, a track 26 is. secured to the box bottom to extend longitudinally thereof and slidable on this track is a carriage 25 having relativel transverse tracks 27 fixed thereto. Slidab e in the tracks 27 is a second carriage 28 having fixed thereto a board 29 that forms the mount for the lamp sockets 30. A shaft 31 having an exteriorly arranged operating knob 32 extends through a wall of the box 1 and is journaled in the tracks 27 in such manner that its endwise movement relatively thereto is prevented though it may rotate freely. in the present instance, the joal consists of a bearing strap 33 secured to the track 27 and embracing a reduced portion 3% on the shaft. Beyond the bearing the shaft is provided with a gear 35 that meshes with a rack 36 on carriage 28.

The operation of this lampsupport is obvious. By pushing or pulling on the shaft 31, the two carriages remain locked together and through the medium of the lower one 25, the upper one 28 directly supporting the lamps is moved to any desired position longitudinally of the chamber. When the shaft is rotated, the lower carriage 25 remains stationary and, through the medium of the rack and pinion 85 -36, the upper carriage 28 is adjusted on the lower carriage to any desired position in a direction transversely of the chamber.

The electrical connections are, of course of a flexible nature permitting the desire range of movement.

It will be seen that the above described printing machine is very sim la in construction and operation and can e produced at 65 low cost and within the reach of the average amateur photographer.

I claim as my invention:

1. In a photographic printing machine, the combination with a light chamber having a printing aperture, of a lamp in the chamber, an adjustable support therefor comprising two carriages movable at right angles to each other on the wall of the-chamber opposite the aperture in lateral directions relatively to the latter, the lamp being directly mounted on one carriage and the latter on the other carriage, and a coon operating member controlling both. carriages 12nd accessible from the exterior of the chamer. v

2. In a photographic printing mace, the combination with a light chamber having a printing aperture, of a lamp in the chamber, an ad ustable support therefor comprising two carriages movable at right angles to each other on the wall of the cham ber opposite the aperture in lateral directions relatively to the latter, the lamp being directly mounted on one carriage and the latter on the other carriage, and a slidable and rotatable operating member acres sible from the exterior of the chamber and connected to operate one carriage by its sliding movement and the other by its rotary moveinent. h h t hm 3. n a p otograp ic rin in mac e the combination with a li ht cha mber hav ing a printing aperture and provided with a track on the wall opposite to said aperture, of a carriage movable on the track a shaft projecting through a wall of the chamber and journaled on the carriage to move the latter on the track as the shaft is I15 longitudinally, a second carriage guided to move transversely on the first and provided with a rack, a lamp carried by said last mentioned carriage, and a gear on the shaft cooperating with the rack, the movement oi both carriages being in transverse directions 11m? relatively to the printing aperture.

FREDERICK W. BN'ES.

Witnesses: I

Rosanne B. G, Acnns Nnsnrrr Breanne. 

